Investigation of Multi-Pole Spark Ignition Under Lean Conditions and with EGR

Xie, Kelvin; Yu, Shui; Yu, Xiao; Bryden, Geraint; Zheng, Ming; Liu, Mengzhu

doi:10.4271/2017-01-0679

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…The three-pole ignition systems were extensively evaluated in the combustion cells and research engines. 40,53,68 The results indicated a promising increase in the initial flame kernel growth rate, thereby resulting in shortened ignition delay and improved engine stability for lean-burn engine operation. Han .…”

Section: Multi-pole Spark Ignitionmentioning

confidence: 95%

“…Xie evaluated the three-pole igniter on a single-cylinder research engine to exploit the lean-burn and EGR diluted combustion limit. 68 The results indicated that under conditions where ignition difficulties are modest, three-pole igniter and standard spark plug achieve comparable performance with optimized spark timing for each strategy. Under high EGR rates or very lean conditions where the ignition is more difficult, the dilution limits are extended with the multi-pole igniter.…”

Section: High-energy Spark Ignitionmentioning

confidence: 95%

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Future gasoline engine ignition: A review on advanced concepts

Zheng

2020

International Journal of Engine Research

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To meet the future requirements of fuel economy and exhaust emissions, high-efficiency gasoline engines tend to employ diluted combustion concepts along with intensified charge motion and stratified mixtures. Securing the ignition of such mixtures over the full engine operation range is challenging, because of the lowered mixture reactivity and increased discrepancy of stoichiometry. In recent years, increasing research efforts have been spending on innovations of ignition technologies to tackle the challenges. In this paper, the directions of ignition improvement are highlighted based on the fundamental understanding of the ignition mechanisms. The working principles of the primary types of advanced ignition systems are introduced; and relevant engine and combustion vessel test results are reviewed. The ignition systems are categorized as: (1) high-energy spark ignition, (2) pulsed nanosecond discharge ignition, (3) radio-frequency plasma ignition, (4) laser-induced plasma ignition, and (5) pre-chamber ignition. The advanced ignition systems are commented, regarding the ignition effectiveness and the implementation challenges, according to the literatures and the extensive empirical work at the authors’ laboratory.

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Section: Multi-pole Spark Ignitionmentioning

confidence: 95%

Section: High-energy Spark Ignitionmentioning

confidence: 95%

Future gasoline engine ignition: A review on advanced concepts

Zheng

2020

International Journal of Engine Research

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“…The multi-core igniter generates three spark channels in different directions and locations, which substantially increases the probability of successful ignition as the air-fuel mixture flows across the spark gaps. The multi-core igniter has been studied in a single cylinder research engine to extend the lean-burn and EGR diluted combustion limits, 27 as well as demonstrated in a production engine to improve fuel economy. 28 Conventionally, a coil-based ignition system employs one set of ignition coil to generate one spark event upon receiving the spark trigger.…”

Section: Introductionmentioning

confidence: 99%

Elastic breakdown via multi-core high frequency discharge for lean-burn ignition

Han

Zhu

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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An advanced ignition technique is developed to achieve multi-event breakdown and multi-site ignition using a single coil for ignition quality improvements. The igniter enables a unique elastic breakdown process embracing a series of high-frequency discharge events at the spark gap. The equivalent electric circuits and current/voltage equations are identified and verified for the first time to explain the working principle that governs such an elastic breakdown process. Benchmarking tests are first performed to compare the elastic breakdown ignition with the conventional and advanced multi-electrode ignition systems. The elastic breakdown and spark events are thereafter analyzed through current and voltage measurements and high-speed imaging techniques. Finally, ignition tests in combustion chambers are performed to examine the effects on the ignition process in comparison with conventional coil-based ignition systems. The experiments show that, the elastic breakdown ignition can distribute multiple high-frequency breakdown events at all electrode pairs of a multi-electrode sparkplug while using only one ignition coil, thereby offering significant cost saving advantage and packaging practicability.

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“…Butanol is a 4-carbon atomic alcohol and a promising renewable alternative fuel . Butanol can be produced by biomass fermentation; its production technology is rapidly growing more sophisticated .…”

Section: Introductionmentioning

confidence: 99%

“…5 Butanol is a 4-carbon atomic alcohol and a promising renewable alternative fuel. 6 Butanol can be produced by biomass fermentation; its production technology is rapidly growing more sophisticated. 7 Compared with ethanol or methanol, butanol's combustion characteristics are closer to that of gasoline.…”

Section: Introductionmentioning

confidence: 99%

Combined Effects of Cooled EGR and Air Dilution on Butanol–Gasoline TGDI Engine Operation, Efficiency, Gaseous, and PM Emissions

Zhao

Wang

2020

ACS Omega

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Biobutanol is a promising alternative fuel for sparkignition engines. Exhaust gas recirculation (EGR) and air dilution were evaluated on a TGDI engine fueled with butanol−gasoline (B20) in view of engine operation, efficiency, gaseous emissions, and PM emissions. For the B20 engine, EGR affected combustion more strongly than excess air dilution; the brake thermal efficiency (BTE) under excess air dilution was much higher than that with EGR. The oxygen concentration in the cylinder was also markedly reduced with EGR relative to air dilution, as the partial fresh charge was substituted with nonreactive gas. A reduced oxygen concentration contributed to differences in combustion between excess air dilution and EGR. Higher BTE was observed during combined EGR and excess air dilution operation, though it was slightly lower than that under excess air dilution alone. NO x was also markedly reduced by the combination of EGR and excess air dilution, but was slightly higher than that with EGR alone. Under combined dilution conditions, the particle number (PN) emissions from the B20 engine were reduced significantly, particle sizes decreased, and the nucleate PN significantly decreased.

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Investigation of Multi-Pole Spark Ignition Under Lean Conditions and with EGR

Cited by 10 publications

References 4 publications

Future gasoline engine ignition: A review on advanced concepts

Future gasoline engine ignition: A review on advanced concepts

Elastic breakdown via multi-core high frequency discharge for lean-burn ignition

Combined Effects of Cooled EGR and Air Dilution on Butanol–Gasoline TGDI Engine Operation, Efficiency, Gaseous, and PM Emissions

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